Bicycle with auxiliary motor



Sept. 20, 1932. LESAGE I 1,878,975

BICYCLE WITH AUXILIARY MOTOR Filed Jan. 2, 1932 Patented Sept. 20, 1932ALFRED LnsAeE, or scnwnmrum 11v savanna,

GERMANY BICYCLE WITH AUXILIARY MOTOR Application filed January 2, 1932,

The invention relates to motor-cycles, and

more especially to the equipment or mounting with an auxiliary motor bymeans of fastenings allowing of the ready attachment or I removal of themotor without requiring alteration of the bicycle itself which may be ofthe usual type.

' The object of the invention is' to provide fastenings which adaptthemselves to the shape of the bicycle frame, while permitting the motorto-assume a convenient position within the frame in which it is enclosedand protected between the frame tubes, but capable of adjustment in theplane of the frame, thereby causing tightening of the chain whichtransmits power from the motor to the rear wheel. This object isattained by the application of a two-armed angular brace or bracket tothe frame tubes beginning at the crank axle box, whereby it embracessaid tubes near the box and projects in the acute angle forme of themotor 1s received in a recess ofthe top of the bracket and securedtherein by a bolt passing through the saidparts. This connection allowsthe motor to rock on the supporting bracket lengthwise the framefiAnother object of the invention is the adaptation of the arms of thebracket to the relative position of the frame tubes by means of a swivelring provided within at least one arm of the bracket.

1 The motor-can further be immobilized at its upper part upon a frametube through an adjustable connecting clamp, whereby the motor will bepivoted on the two-armed bracket and adjusted in a position in which thedriving chain will be tightened.

An embodiment of the invention is illustrated, by way of example, in theannexed drawing, which forms a part of this specification and inwhich--:

Fig. 1 illustrates a part of a'bicycle frame provided with the novelfastening means, I and a part of the motor in a side elevation,

Figs. 2 and 3- show an angular fastening bracket or clip in differentperspective views, Fig 4 is a top plan view of theupper fastening clipand of connecting tubes, and

Serial No. 584,548, and in Germany June 7,

Fig. 5 is a side-elevation of abicycle with the motor mounted therein,on a smaller scale.

Like numerals denote like parts throughout all figures of the drawing.

The lower portion of the crank casing 8 of the motor is fastened to thecycle frame by means. of an angular bracket composed of two parts thearm 17 of which is fixed around the saddle-supporting tube 10 above thecrank axle bearing 5 while the other arm 18 of the said bracket isattached to the lower frame tube 19. The two halves of the bracket arerigid pieces and assembled in the usual manner by bolts as shown inFigs. 1 to 3; In the central and top part the faces of the two halvesopposite each other are recessed so that a cut-out portion 20 is formedin which a lug 9 of an intermediate piece 21 is received. The bracketand the intermediate piece are pivotally connected to each other by abolt 7 .passing through the big 9 and the d top by the tubes. A lugprovided at the lower end I part of the said bracket. At the, same timethe said bolt 7 contributes for holding I thebracket halves together.The part of the arm 18 surrounding the tube 19 is shaped. as I5 ahollow. sphere and contains a split ring 22 which is shaped as a sphereon its outside in accordance with the hollow sphere referred to. Whenthe bracket is forced together, the said ring engages the frame tube 19and at so the same time adjusts itselfwithin the arm 18 according to theangle formed by the two 7' tubes 10 and 19, prior to beingfullycompressed. By means of the said adjusting ring 22 the bracket willbe safely fastened without risk of the frame being warped under tension.

The intermediate piece 21 is mounted on the crank case 8 of the motor inany suitable way, e. g., by rivets, as shown, or screw bolts. The saidpiece surrounding the bottom of the crank case in a certain extent, socontributes to the whole unit being strengthened. The device intendedfor securing the top portion of the crank case 8 to the saddlesupportingtube 10 is also made in the shape of a clip 11 in respect-to whichadjusting screw threaded rods 13 connected to the upper end of the saidcase 8 may be. adjusted in eyes 12 of the clip by means ofnuts 14.

' tachment to the frame bracket having the motor, a pivot bolt a lugprovided on the lower part of the motor an Moreover, the clip 11 is:preferably provided on its sides with threaded projections 23 to. whichare secured by means of nuts the front ends of stiffening tubes 16leading to the end piece 24 of'the rear fork.

his construction of the bracket and its atpermit of a ready and reliableinterconnection and a convenient pivotal support of the motor bicyclewithout requiring alteration or workmg of the frame. Besides theseadvantages, the motor can beeasil rocked to adjust it for tightening ofthe chain transmitting the drive to the-rear wheel of the cycle or forother desirable purposes. What I claim is-- 1. In a motor cycle, thecombination with a usual bicycle frame, of an angular rigid two armsembracin frame tubes above the crank axle bearin a motor, a lug providedon the lower end of passing through said ing and the top part of saidbracket, and means for adjustably part of the motor to the frame.

2. The combination with abicycle frame of usual type, of a motor locatedtherein, an

angular rigid bracket having two arms and composed of two halves, boltsassembling said halves around the frame tubes near and above the crankaxle bearing of said frame,

received in a recess formed in the top of said bracket, a pivot boltpassing through the lug and both halves of the bracket, and meanscapable of adjustably attaching the upper part of the motor to theframe.

3.'The combination with a bicycle frame of usual type, of a motormounted therein, an angular rigid bracket havin two arms embracing thetubes of said rame near and above the crank axle bearing, an adjustablespanning ring arranged in at least one arm of the bracket, a lugprovided on the lower end of'said motor, a pivot bolt engaging bores ofthe lug and the top of the bracket, and means for the adjustableattachment of the upper part of the motor to a frame tube.

The combination with a cycle frame of the usual type, of an angularrigidbracket having arms embracing the tubes of the frame of the near andabove the crank axle bearin frame, a motorsupported by, and pivotallyconnected to, the said bracket, ing the saddle-supporting tube of theframe, eyes formed on the side faces of said clip, screw threaded rodsengaging saideyes and pivotably attached motor, and adjusting nutsscrewed upon said rods. In witness whereof I have to this specification.

ALFRED LESAGE.

in the frame of a,

attaching the uppera clip embrac-' to the upper part of the signed myname

